Accessing OC4J application through OHS, how?

Question

We developed a standalone web app on OC4J. Now we would like to deploy this application to a standalone OC4J running on the same machine as 9iAS. We would like to access our application through 9iAS OHS, possibly with as few changes to our application as possible.
So instead of http://oc4jhost:8888/appname/whatever.jsp
we want http://standardhost/appname should then redirect/rewrite to port 8888 and so on.
Is there a document that describes which configuration files need to be manipulated and how?
We assume mod_oc4j, httpd.conf, orion*.xml, and possibly others have to be edited.
We do not want to run our application INSIDE of 9iAS, because it uses its own frameset and because we want a more up-to-date Java for this application.

Answer 1

Note that
The business client does not need a portal (it can but does not have to)
but NWBC can connect as well (by using the sapgui in the background-
hence sapgui needs then to be installed as well on the same client as
the NWBC) directly against the backend.
http://help.sap.com/saphelp_nw70ehp2ru/helpdata/en/31/8dd113b8ba4832aeaa
fb4b756e1eed/frameset.htm
http://help.sap.com/saphelp_nw70ehp2ru/helpdata/en/31/8dd113b8ba4832aeaafb4b756e1eed/frameset.htm
As of SAP enhancement package 5 for SAP ERP 6.0 you can choose from the
following deployment options for ESS:
Deployment Option 1: WD ABAP-Based ESS on NWBC
Deployment Option 2: WD ABAP-Based ESS on SAP NetWeaver Portal
Deployment Option 3: WD Java-Based ESS on SAP NetWeaver Portal
Activate the switch HCM_ESS_WDA_1 to use WD ABAP services
ESS Refer Note 1450179
EhP 5 ESS: The architect's view